681477104 has 120 divisors (see below), whose sum is σ = 1764172800. Its totient is φ = 251475840.

The previous prime is 681477101. The next prime is 681477109. The reversal of 681477104 is 401774186.

It is a super-2 number, since 2×681477104² = 928822086552453632, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (681477101) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 161777 + ... + 165935.

It is an arithmetic number, because the mean of its divisors is an integer number (14701440).

Almost surely, 2^681477104 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 681477104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (882086400).

681477104 is an abundant number, since it is smaller than the sum of its proper divisors (1082695696).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

681477104 is a wasteful number, since it uses less digits than its factorization.

681477104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4211 (or 4198 counting only the distinct ones).

The product of its (nonzero) digits is 37632, while the sum is 38.

The square root of 681477104 is about 26105.1164333737. The cubic root of 681477104 is about 880.0021969642.

The spelling of 681477104 in words is "six hundred eighty-one million, four hundred seventy-seven thousand, one hundred four".